Portable audio system



FIG. 1 is a perspective view of a portable audio system as seen from thefront, top, and side;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a side view thereof; and,

FIG. 7 is an opposite side view thereof.

The dotted line portions of the drawings represent environmentalstructure only and form no part of the claimed design. The broken lineshowing of numbers, words, and symbols forms no part of the claimeddesign.

CLAIM The ornamental design for a portable audio system, substantiallyas shown and described.